class_docstr: TEXT is a Plex action which causes the text of a token to
  be returned as the value of the token. See the docstring of
  Plex.Lexicon  for more information.
code: def perform(self, token_stream, text):
      return text
  
label_desc: Use image node_id 1 for calling the Text obj's underlying member method code with example usage: obj.perform(token_stream, text) and returns: text